/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.dolphinscheduler.plugin.alert.feishu;

import org.apache.dolphinscheduler.alert.api.AlertData;
import org.apache.dolphinscheduler.alert.api.AlertResult;
import org.apache.dolphinscheduler.common.utils.JSONUtils;

import org.apache.commons.codec.binary.StringUtils;
import org.apache.commons.collections.CollectionUtils;
import org.apache.http.HttpEntity;
import org.apache.http.HttpStatus;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.util.EntityUtils;

import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.fasterxml.jackson.annotation.JsonProperty;

public final class FeiShuSender {
  private static final Logger logger = LoggerFactory.getLogger(FeiShuSender.class);
  private final String url;
  private final Boolean enableProxy;

  private String proxy;

  private Integer port;

  private String user;

  private String password;

  FeiShuSender(Map<String, String> config) {
    url = config.get(FeiShuParamsConstants.NAME_WEB_HOOK);
    enableProxy = Boolean.valueOf(config.get(FeiShuParamsConstants.NAME_FEI_SHU_PROXY_ENABLE));
    if (Boolean.TRUE.equals(enableProxy)) {
      port = Integer.parseInt(config.get(FeiShuParamsConstants.NAME_FEI_SHU_PORT));
      proxy = config.get(FeiShuParamsConstants.NAME_FEI_SHU_PROXY);
      user = config.get(FeiShuParamsConstants.NAME_FEI_SHU_USER);
      password = config.get(FeiShuParamsConstants.NAME_FEI_SHU_PASSWORD);
    }

  }

  private static String textToJsonString(AlertData alertData) {
    Map<String, Object> items = new HashMap<>(2);
    items.put("msg_type", "text");
    Map<String, String> textContent = new HashMap<>();
    byte[] byt = StringUtils.getBytesUtf8(formatContent(alertData));
    String txt = StringUtils.newStringUtf8(byt);
    textContent.put("text", txt);
    items.put("content", textContent);
    return JSONUtils.toJsonString(items);
  }

  public static AlertResult checkSendFeiShuSendMsgResult(String result) {
    AlertResult alertResult = new AlertResult();
    alertResult.setStatus("false");

    if (org.apache.commons.lang3.StringUtils.isBlank(result)) {
      alertResult.setMessage("send fei shu msg error");
      logger.info("send fei shu msg error,fei shu server resp is null");
      return alertResult;
    }
    FeiShuSendMsgResponse sendMsgResponse = JSONUtils.parseObject(result, FeiShuSendMsgResponse.class);

    if (null == sendMsgResponse) {
      alertResult.setMessage("send fei shu msg fail");
      logger.info("send fei shu msg error,resp error");
      return alertResult;
    }
    if (sendMsgResponse.statusCode == 0) {
      alertResult.setStatus("true");
      alertResult.setMessage("send fei shu msg success");
      return alertResult;
    }
    alertResult.setMessage(String.format("alert send fei shu msg error : %s", sendMsgResponse.getStatusMessage()));
    logger.info("alert send fei shu msg error : {} ,Extra : {} ", sendMsgResponse.getStatusMessage(), sendMsgResponse.getExtra());
    return alertResult;
  }

  public static String formatContent(AlertData alertData) {
    if (alertData.getContent() != null) {

      List<Map> list = JSONUtils.toList(alertData.getContent(), Map.class);
      if (CollectionUtils.isEmpty(list)) {
        return alertData.getTitle() + alertData.getContent();
      }

      StringBuilder contents = new StringBuilder(100);
      contents.append(String.format("`%s`%n", alertData.getTitle()));
      for (Map map : list) {
        for (Entry<String, Object> entry : (Iterable<Entry<String, Object>>) map.entrySet()) {
          String key = entry.getKey();
          String value = entry.getValue().toString();
          contents.append(key + ":" + value);
          contents.append("\n");
        }
      }
      return contents.toString();
    }
    return null;
  }

  public AlertResult sendFeiShuMsg(AlertData alertData) {
    AlertResult alertResult;
    try {
      String resp = sendMsg(alertData);
      return checkSendFeiShuSendMsgResult(resp);
    } catch (Exception e) {
      logger.info("send fei shu alert msg  exception : {}", e.getMessage());
      alertResult = new AlertResult();
      alertResult.setStatus("false");
      alertResult.setMessage("send fei shu alert fail.");
    }
    return alertResult;
  }

  private String sendMsg(AlertData alertData) throws IOException {

    String msgToJson = textToJsonString(alertData);

    HttpPost httpPost = HttpRequestUtil.constructHttpPost(url, msgToJson);

    CloseableHttpClient httpClient;

    httpClient = HttpRequestUtil.getHttpClient(enableProxy, proxy, port, user, password);

    try {
      CloseableHttpResponse response = httpClient.execute(httpPost);

      int statusCode = response.getStatusLine().getStatusCode();
      if (statusCode != HttpStatus.SC_OK) {
        logger.error("send feishu message error, return http status code: {} ", statusCode);
      }
      String resp;
      try {
        HttpEntity entity = response.getEntity();
        resp = EntityUtils.toString(entity, "utf-8");
        EntityUtils.consume(entity);
      } finally {
        response.close();
      }
      logger.info("Fei Shu send title :{} ,content :{}, resp: {}", alertData.getTitle(), alertData.getContent(), resp);
      return resp;
    } finally {
      httpClient.close();
    }
  }

  static final class FeiShuSendMsgResponse {
    @JsonProperty("Extra")
    private String extra;
    @JsonProperty("StatusCode")
    private Integer statusCode;
    @JsonProperty("StatusMessage")
    private String statusMessage;

    public FeiShuSendMsgResponse() {
    }

    public String getExtra() {
      return this.extra;
    }

    @JsonProperty("Extra")
    public void setExtra(String extra) {
      this.extra = extra;
    }

    public Integer getStatusCode() {
      return this.statusCode;
    }

    @JsonProperty("StatusCode")
    public void setStatusCode(Integer statusCode) {
      this.statusCode = statusCode;
    }

    public String getStatusMessage() {
      return this.statusMessage;
    }

    @JsonProperty("StatusMessage")
    public void setStatusMessage(String statusMessage) {
      this.statusMessage = statusMessage;
    }

    public boolean equals(final Object o) {
      if (o == this) {
        return true;
      }
      if (!(o instanceof FeiShuSendMsgResponse)) {
        return false;
      }
      final FeiShuSendMsgResponse other = (FeiShuSendMsgResponse) o;
      final Object this$extra = this.getExtra();
      final Object other$extra = other.getExtra();
      if (this$extra == null ? other$extra != null : !this$extra.equals(other$extra)) {
        return false;
      }
      final Object this$statusCode = this.getStatusCode();
      final Object other$statusCode = other.getStatusCode();
      if (this$statusCode == null ? other$statusCode != null : !this$statusCode.equals(other$statusCode)) {
        return false;
      }
      final Object this$statusMessage = this.getStatusMessage();
      final Object other$statusMessage = other.getStatusMessage();
      if (this$statusMessage == null ? other$statusMessage != null : !this$statusMessage.equals(other$statusMessage)) {
        return false;
      }
      return true;
    }

    public int hashCode() {
      final int PRIME = 59;
      int result = 1;
      final Object $extra = this.getExtra();
      result = result * PRIME + ($extra == null ? 43 : $extra.hashCode());
      final Object $statusCode = this.getStatusCode();
      result = result * PRIME + ($statusCode == null ? 43 : $statusCode.hashCode());
      final Object $statusMessage = this.getStatusMessage();
      result = result * PRIME + ($statusMessage == null ? 43 : $statusMessage.hashCode());
      return result;
    }

    public String toString() {
      return "FeiShuSender.FeiShuSendMsgResponse(extra=" + this.getExtra() + ", statusCode=" + this.getStatusCode() + ", statusMessage=" + this.getStatusMessage() + ")";
    }
  }
}
